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HomeMy WebLinkAboutERC Mitigation Measures_Selland Thorpe Res JU Pier_15-000489DETERMINATION OF NON-SIGNIFICANCE-MITIGATED (DNSM) MITIGATION MEASURES AND ADVISORY NOTES PROJECT NUMBER: LUA15-000489, ECF, SM APPLICANT: Mark Selland PROJECT NAME: Selland-Thorpe Residential Joint Use Pier PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review and approval of a Shoreline Substantial Development Permit for the construction of an 80-foot long joint use pier and two free-standing boat lifts in association with two single-family homes on the shore of Lake Washington, a Shoreline of Statewide Significance. The proposed project site encompasses two lots (5,634 and 5,571 square feet) at 4017 and 4023 Williams Ave N. The total area of the site is 11,205 square feet within the R-10 zone. Construction materials would be transported to the site by barge. Eight steel piles are proposed to be installed by a barge-mounted vibratory pile driver. The pier would have fully grated thruflow decking, four dock lights connected to 4017 Williams Ave N, and a dock ladder at the waterward end. The shoreline is armored with a concrete and steel bulkhead. The landward section of the pier would be supported by the existing bulkhead. An existing shared concrete stair walkway provides access from the homes to the shoreline. Twenty native shrubs will be added along the bulkhead shoreline in addition to four trees. Dead plants in the vegetated shoreline would be replaced. The applicant submitted a Biological Evaluation/Lake and Stream Study/Habitat Data Report. PROJECT LOCATION: 4017 & 4023 Williams Ave N LEAD AGENCY: The City of Renton Department of Community & Economic Development Planning Division MITIGATION MEASURES: The applicant shall follow the recommendations identified in the Biological Evaluation/Lake and Stream Study/Habitat Report and Addendum, prepared by Marine Surveys and Assessments, dated June 8, 2015 and June 30, 2015, including but not limited to the “Construction Sequence” subsection on page 5. The applicant shall provide a revised planting plan that includes either Oregon Ash, Shore Pine, or Sitka Willow tree species and identifies the locations of the replacement plants to the Current Planning Manager, for review and approval, prior to issuance of the Shoreline Substantial Development Permit. Prior to any construction activities, a silt containment curtain shall be installed around the project area to minimize impacts from disturbed sediments which may occur during pile driving activities. This silt curtain shall remain in place until construction activities are completed. Any construction debris which enters Lake Washington waters shall be immediately retrieved and placed on the construction barge. If at any time, as a result of project activities, fish are observed in distress, a fish kill occurs, or water quality problems develop (including equipment leaks or spills), operations shall cease and the Washington Department of Fish and Wildlife and the Department of Ecology shall be contacted immediately. Work shall not resume until further approval is given by the Washington Department of Fish and Wildlife. Construction shall take place only during the Washington Department of Fish and Wildlife approved in-water work periods (fish window) currently established as July 16 through December 31. The dock lights shall have an amber hue. The proposed lighting and amber hue shall be included with the building permit application for the subject project, for review and approval by the Current Planning Project Manager. ADIVISORY NOTES: The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use actions. Engineering Review Comments Contact: Vicki Grover | 4254307291 | vgrover@rentonwa.gov • A lighting study needs to be conducted. • The proposed lighting needs to be amber hued and shrouded. • Is there a proposal to remove the existing dock? • Include dock grate details and material specs. • Project narrative does not match the plans. • The plans do not match the SEPA. PLAN  Planning Review  Land Use Version 2 | December 10, 2015 Planning Review Comments Contact: Kris Sorensen | 4254306593 | ksorensen@rentonwa.gov Recommendations: 1. RMC Section 4 4 030.C.2 limits haul hours between 8:30am to 3:30pm, Monday through Friday unless otherwise approved by the Development Services Division. 2. Commercial, multi family, new single family and other nonresidential construction activities shall be restricted to the hours between 7:00am and 8:00pm, Monday through Friday. Work on Saturdays shall be restricted to the hours between 9:00am and 8:00pm. No work shall be permitted on Sundays.